explain mechanism of breathing in humans
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When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
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Breathing is the physical process of inhaling oxygen and exhaling carbon dioxide. The mechanism of breathing involves two main processe: inspiration and expiration. Inspiration occurs when the diaphragm and the external intercostal muscles contract. Expulsion of air is called expiration.
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